Question

suppose I am getting 2 strings

"About product" and "About Us"

and I want to store them in String array like

myArray[]={"About product", "About Us"};

how to do this?

Answer 1

You are reading strings dynamically, and you want to end up with an array of them (String[]), but you don’t know how many there are until you’ve read them all.

In Java, arrays are of fixed length, so the answer is not to store them in an array until you know how many there are. What you need is a temporary list. There are several lists you can use, depending upon certain performance characteristics, but the ArrayList is a reasonable choice.

ArrayList<String> arrList = new ArrayList<String>();

will create a new array list. Then in a loop you can read a string and add it to the list (which will expand to accommodate each new entry):

arrList.add(str);

and then you can create and fill the array you really wanted. There is a convenience method on Lists for doing this, like this:

String[] strArray = arrList.toArray(new String[arrList.size()]);

It is not obvious at first glance why the toArray method needs to have the array passed to it, but it makes the call typesafe, and you don’t have to cast the result to String[]. You can read the JavaDoc for this method here.